Typewriting machine



March 27, 1934. A, HART TYPEWRITING MACHIN Filed Dec. 26. 1931 3 Sheets-Sheet l INVENTOR WITNESSES ATTORNEY March 27, 1934. IF. A. HART TYPEWRITING MACHINE Filed Dec. 26. 1931 3 Sheets-Sheet 2 Nu m S E 5 S E N H W ATTORNEY March 27, 1934. F. A. HART TYPEWRITING MACHINE Fil ed Dec. 26. 1931 3 Sheets-Sheet S INVENTOR ATTORNEY WITNESSES Patented Mar. 27, 1934 UNITED STATES PATENT OFFICE 30 Claims. 9 (Cl. 197-17) My invention relates to typewriting and like machines and more particularly to power actuated date printing mechanism for such machines, and by which the date may be printed at a single 5 operation.

The main object of the invention, generally stated, is to provide comparatively simple, yet highly eflicient, mechanism of the character referred to.

A further object of my invention is to provide mechanism of the character specified which may be readily incorporated in existing machines without modifying, or materially modifying, the existing structural features thereof.

A still further object of the invention is to provide power actuated date printing mechanism of the character referred to in which cooperative parts thereof are carried by two relatively movable sections of frame of the machine and in 20 which such parts are brought into cooperative relation ready to function when the two frame sections are brought together.

To the above and other ends which will hereinafter appear my invention consists of the fea- 5 tures of construction, arrangements of parts and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

Inthe accompanying drawings wherein like ref erence characters indicate corresponding parts in the different views:

Fig. 1 is a detail, fragmentary, side elevation with parts in section of a typewriting machine equipped with the devices of my invention;

Fig. 2 is an enlarged, detail, front elevation of a portion of the date printing type action, the type bar being shown in printing position;

Fig. 3 is an'enlarged, detail, top plan view of the same, with parts in section;

Fig. 4 is a transverse, sectional view of the type bar taken on the line 4-4 of Fig. 3 and looking in the direction of the arrows at said line;

Fig. 5 is an enlarged, detail, fragmentary, perspective view of the detachable type carrying 45 member or section of the type bar;

Fig. 6 is a fragmentary, side elevation of the lower portion of the machine;

Fig. 7 is an enlarged, detail, fragmentary, top view of the date printing type bar showing the 50 members connected together, the view showing parts of the structure in section;

Fig. 8 is an enlarged, detail, fragmentary, side edge view with parts in section of the type bar or carrier, the parts being shown as they appear 5 when the detachable section is in the act of being connected to the companion section of the type bar; and

Fig. 9 is a detail, fragmentary, side view of a modified form of trip releasing means.

I have shown my invention embodied in a Remington electrified bookkeeping machine" such as is disclosed in my application Serial No. 510,941, filed Jan. 24, 1931, and in which the devices of my present invention may be readily incorporated without materially modifying the existing structural features of said machine. It should be understood, however, that the invention is not restricted to use in this machine but may be employed in typewriting, computing and like machines generally wherever found available.

I have only shown so much of a Remington electrified bookkeeping machine as is necessary to illustrate my invention in its embodiment therein, the simplified showing of such machine facilitating an understanding of the present invention.

As shown in Fig. 6 the frame of the machine in question is made of two sections, an upper section 10 and a lower or base section 11. These sections are hinged together at 12 so that the upso per section 10 may be swung back to give access to the parts contained within the frame. In the present instance I constructed the power actu ated date printing mechanism so that cooperative parts thereof are carried by the two frame sections and are brought into cooperative relation ready to function when such frame-sections are brought together as shown in Fig. 6, .and which will hereinafter more clearly appear.

.pulley 19 fixed on a stub shaft'20. This stub shaft is carried by the lower or base section 11 of the frame and carries a pinion 21 which meshes with a gear 22 fixed on a shaft 23 on which are loosely mounted cams 24 by which the computing mechanism and numeral printing type bars (not shown) are actuated, as disclosed in my hereinbefore mentioned application. The shaft 23 likewise carries 155 a pulley 25 which cooperates with a belt 26 that is received on a pulley 2'7. A belt tightener 28 coacts with this belt and the shaft 29 on which the belt pulley 27 is mounted constitutes the shaft on which a snatch roll 30 is fixedly mounted.

Said snatch roll is employed to actuate the alphabet printing type bars (not shown). The shaft 29 of the snatch roll is preferably mounted on ball bearings and projects beyond the base 11 at the left-hand side of the machine. A pinion 33 is fixed on the left-hand end of this shaft 29 and cooperates with an idler 34 preferably mounted on ball bearings. This idler in turn meshes with a gear 36 fixed on a shaft 37 that extends across the machine and is preferably supported on ball bearings.

The construction described above for transmitting motion from the continuously running motor 13 to the shaft 37 is similar to that disclosed more in detail in an application filed by me Dec. 14, 1931 and bearing Serial No. 580.838, it being understood that the shaft 37 and the driving means therefor are employed for actuating other instrumentalities than the date printing type carrier which is actuated thereby in the present instance, as will now be described.

Loosely mounted on the shaft 37 near the righthand end thereof is a cam 40 by which the date printing type bar or carrier is actuated. This cam is preferably supported on the shaft by ball bear ings, the bearing balls being indicated at 41 in Fig. 1. Adjacent to the cam 46 is a locking .wheel 42 fixed to the cam shaft 37 and having a series of regularly spaced interdental locking recesses or openings 43 therein. Pivoted at 44 on one side of the cam 40 is a locking pawl or latch 45 having an engaging nose 46 and a laterally extending projection 47.

Pivotally connected to the locking latch is a rod against a shoulder on the rod 48. The effective force of this spring is exerted to turn the looking pawl 45 on its pivot and effect an engagement thereof in a locking notch or recess 43 in the locking wheel. The effect of such engagement is to lock or couple the cam 40 to turn with the shaft 37.

In "order to control the engagement of the locking'pawl with, and its disengagement from, the locking wheel 42, I employ the following described instrumentalitiesQ There is'provided in the keyboard of'the machine a date printing key 51 on a lever 52 which is pivoted at 53 on the front right-hand, corner'post 1 0 of the upper frame section. This lever carries a depending arm whichis pivoted at. 54 to a rearwardly extending linkor releasing member 55.- The rear end of this link is provided with an upwardly and rearwardly extending: finger 56 that is supported on a rock shaft 57 andi's'guided against lateral deflection by collars 58 secured to the rock shaft 57 by set screws 59 and are maintained on opposite sides of the finger 56'to guide it to the link in the operating movement of; the latter. The shaft 57 is employed in the machine for another purpose than that described, but I avail myself of it as a support for the rear end of the link 55. It will be seen that this link is provided with an inclined face or cam edge 60 that bears against the rock shaft 57 and effects an upward movement of the link as the latter is moved rearward, for purposes which will hereinafter appear fThe lower end of the inclined or cam edge '60 joins an upright abrupt edge or face 61 on the link. A contractile spring 62 is connected at one end to the link 55 and at its opposite end to a sheet metal bar 63. This spring is inclined downwardly from the link to its anchorage and the effective force of the continuously driven shaft 37 revolves independently thereof. A contractile spring 67 is connected at one end to the trip 64 and at its opposite end to a sheet metal bar 68. The force of this spring is exerted to maintain the trip in its normal position, shown in Fig. 1, with an extension 69 thereon in contact with an adjustable stop 70 carried by a supporting'bar 71 to which the sheet metal bar 68 is attached. This adjustable stop 70 limits the forward motion of the trip 64 and holds the projection 66 thereon in the path of the projection 47 on the locking pawl. I prefer to form the sheet metal bar 68 with a guide comb 72 in which the trip worksand by which it is prevented from being deflected laterally.

A depression of the date printing key 51 is effective to move the link 55 rearward, thereby forcing the trip 64 in the same direction and disengaging the projection 66 thereon from the locking latch. When this disengagement is effected, the locking latch will be forced into engagement with the locking wheel by the spring 50 and thus lock the cam 40 to turn with the shaft. At about the time that the trip 64 is thus moved to disengaging position the rear end of the link 55, due to the up ward camming movement of the rear end thereof, will be freed from the trip 64 permitting the latter to be immediately returned to its normal position, shown in Fig. 1, by its spring 67. The immediate return of the trip to normal position even though the key 51 be held depressed, will enable the projection 66 on the trip to be brought into the path of the projection 47 on the locking latch and when the cam has made a single revo- 1 lution will disengage the latch from the locking wheel, thereby arresting the cam while the driving shaft 37 continues to revolve independently thereof. When the operator releases the depressed key 51, the link 55 will be drawn forward by its spring 62. During this return movement of the link a lower cam edge 73 thereon will ride along the upper edge of the trip 64, which has been returned to normal position, until the abrupt face 61 is reached and is free to be moved down in front of the trip by the spring 62. The parts are then again in the Fig. 1 position where an actuation of the key 51 is effective to bring about another single revolution of the cam 40.

I employ this single revolution of the cam 40 at each actuation of the key 51 to bring about an actuation of a date printing typecarrier or type bar as will now be described. An angular lever, designated as a whole by the reference numeral 74, is pivoted at 75 to the rear righthand corner post 10 of the frame section 10. A depending arm 76 of this lever carries an antifriction roller 77 on one side thereof. Said roller bears against the periphery of the cam 40 and a revolution of the cam is effective to actuate the lever 74. Said lever is returned to normal position during the last portion of the revolution of the cam 40 by a contractile spring 78 secured at one end to a pin 79 on the frame section 10 and at its other end to a rearwardly projecting lfll) ILH arm on the angular lever 74. Thelever 74 is provided with a, forwardly projecting arm 81 having a laterally projecting pin 82 at its forward end which engages in a slot 83 in one arm 84 of a bell crank lever pivoted at 85 on a lug 85 which projects from the upper frame section 10. The upright arm 86 of this bell crank lever is bent inward at its upper end, as indicated at 87, where it carries a laterally projecting headed pin 88 that is received in a slot 89 of an actuating lever 90. This lever is pivoted at 91 to a bracket or hanger 92 secured by screws 93 to the right-hand upper portion of a type bar segment 94. and above the usual right-hand terminal slot 95 therein. The hanger 92' also is provided with hanger arms in which a date printing type bar is pivoted at 96.

In the present instance the date printing type bar or carrier comprises two sections or members, one of which, 97, is pivoted at 96 to the hanger 92, and the other or type carrying section 98 of which is detachably connected to the section 97 by the following means. The section 97 has an engaging groove 99 in each side thereof divided by a centrally disposed web 100. The

' stem 101 of the type carrying section 98 is bifurcated and adapted to straddle the web portion of the section 97, as indicated in Fig. 7, when the two parts of the type bar are assembled and united as shown in this view. Ihe section 97 carries a spring pressed plunger or locking pin 102 that is mounted on the free end of a leaf spring 103 riveted at 104 to the section 97. This locking pin or member is adapted to pass through an opening 105 in the type bar section 97. When the parts are assembled in the position shown in Fig. 7, the locking pin 102 is adapted to enter a registering opening 106 in the section 98 of the type bar and provide an interlocking connection therewith which retains the two sections of the type bar united. The outer free end 107 of the pin constitutes a finger piece by which the pin may be released from its locking position to bring a reduced portion 108 thereof into position where it will register with the slot formed by the bifurcation in the stem 101 of the type carrying section, thus permitting an endwise withdrawal of said section from the pivoted member 97. In assembling and connecting the parts the bifurcated stem of the type carrying section 98 is introduced into the grooved sides 99 of the type bar section 97, as shown in Fig. 8, thereby bringing the cam edges 109 on the bifurcated arms against an inclined face 110 on the locking pin and automatically deflecting the latter to a position where it will not interfere with the movement of the stem to the Fig. 7 position. When said stem reaches this position, the spring 103 is effective to move the locking pin into the registering opening 106 and secure the two sections locked together.

The type carrying section-98, in the present instance, is made from a single piece of sheet metal with the type carrying pocket or chamber 111 thereon. This type carrying pocket is adapted to receive three separate type blocks 112, 113 and 114, the type block 112 carrying type face to designate the month, the type face on the block 113 designating the day of. the month, and the type face on the block 114 designating the year.

These type blocks are readily detachable from the carrier and may be changed at will for other corresponding type blocks to effect a change in the indicated date. In the present instance I provide a wire bail 115 pivoted at 116 to the type carrying pocket or receiving chamber. The cross bar 117 of this bail is adapted when the bail is in the locking position, as shown in Fig. 4, to overlie. shoulders 118 formed on the type blocks and to prevent their longitudinal displacement from the type carryingpocket. In this position of the parts the bail is held against accidental movement to the releasing, dotted line position, shown in Fig. 4, by detent studs 119 formed on the sides of the type carrying pocket 111. Suflicient force, however, exerted against the bail is effective to spring it past these detent projections 119 and enable the bail to move to the dotted line, Fig. 4, position, when the type blocks may be readily removed from the carrier. It

will be observed that each type block is providedv with an off-set shoulder 120 that is adapted to bear against the outer edge of one of the side walls of the pocket 111 and thereby support the type blocks on the carrier or pocket. One of the end blocks 114 is likewise provided with an off-set end portion 121 that rests on the edge of one of the end walls of the pocket 111.

This construction is such that the types cannot be .misplaced or inserted upside down in the carrier without warning to the operator. In the event of one or more of the types being inverted the off-set portion 120 thereof will prevent the ban from being moved to locking position, thereby warning the operator that the types have been placed in an inverted position in the carrier. The type block 114 cannot be placed in any other position than its proper place due to the off-set portions 120 and 121 thereon, inasmuch as a misplacement of this block will prevent the blocks from being introduced into the carrier. The same is true in the event of an attempted misplacement of the type blocks 112 and 113.

The construction, arrangement and mounting of the date printing type bar are such that it is adapted to effect an imprint against the front face of the platen b or the paper thereon at the printing center, and at the printing line indicated at a in Fig. 2; the imprint being efiected through the ordinary inking ribbon. It will be observed from this figure that the imprint may be effected being such that the date printing type bar does.

not coact with said center guide. The actuating lever 90 hereinbefore referred to is provided at its free end with a slot 123 through which the type bar is adapted to pass. An opening 124 is likewise provided to aid in the assembly of the parts. An operation of the actuating lever 90 from its normal position shown in Fig. 1 to that indicated in Figs. 2 and 3 is elfective to move the type bar around its pivot 96 to the printing position shown in these last mentioned figures.

By making the-type carrying section 98 of the date printing type bar readily attachable to and detachable from its companion section 97, the changing of the types on the section 98 is greatly facilitated as this may be done outside of the machine. This changing of the types would be rendered diflicult in the absence of such detachable feature. a

From what is said it will be understood that a depression of the date printing key 51 iseffective to move the trip 64 rearward thereby releasing the locking pawl 45 from control of said trip. This will result in the cam 40 being locked to turn with the power driven shaft 37 during a single revolution only of said shaft when the following means.

trip will again effect a disconnection of the locking pawl 45 from its locking wheel and bring about an arrest of the cam 40. The single revolution of the cam 40'operating on the lever '74 brought about an actuation of the lever 84, 86 to actuate the lever 90 and effect a printing operation of the date printing type bar; the parts returning to normal position during the last part of the revolution of the cam 40. The imprint thus effected is brought about positively by the operation of the cam on the intermediate connections between said cam and the date printing type bar.

In order that the ribbon may be interposed in the path of the date printing type bar at each actuation of the latter, I have provided means in the present instance that are actuated by the same revolution of the cam 40 which results in the operation of said type bar. In the present instance I effect this result by the On the depending arm '76 of the lever '74 I mount a curved forwardly extending arm 1 25. I prefer to adjustably connect this arm 125 with.the lever '74, and in the present instance slot the arm 125 as indicated at 126, and provide headed clamping screws 12?. The stems of these screws pass through said slots 126 and are received in tapped openings in the arm 76 of the lever '74. The arm 125 extends forward over the usual universal bar 128 employed to actuate the ribbon vibrator in Remington machines. Such universal bar is ordinarily operated by projections 129 on type bar-operating levers 130 fulcrumed on a fulcrum bar 131 carried by the upper frame section 10, as in the above mentioned Remington electrified bookkeeping machine and other Remington machines. This entire construction from the universal bar 128 to the ribbon vibrator is of the usual construction and will be but briefly referred to herein. The universal bar 128 is carried by a rock shaft 132, which rock shaft carries an upstanding arm 133 slotted at its upper end at 134 to engage a cross pin 135 on a frame 136 pivoted at 137 to a depending fixed bracket 138. Motion is transmitted from the frame 136 in the usual manner to an arm 139 pivoted at 140 and connected to a ribbon vibrator 141. A depression of the universal bar by any of the type bar actuating levers 130 or by the arm 135 is effective to rock the arm 133 and transmit motion through the intervening parts to the ribbon vibrator 141 to elevate the latter and bring the ribbon into the path of the date printing type bar as it approaches the printing position.

It will be understood from a consideration of Fig. 1 that when the looking pawl 45 is maintained disengaged from the locking wheel 42 in the normal position of the parts shown in this figure, the reactive force of the latch spring 50 tends to turn the cam 40 in a clockwise direction. In order to prevent this displacement of the cam due to the reaction of the spring 50, I provide on the cam 40 a high spot 40 with which the roller '77 coacts in the normal position of the parts. The effective force of the spring '78 is such that the roller 7'7 coacting with the high spot 40 on the cam will overcome the reactive force of the spring 50 and prevent the cam from being displaced in a clockwise direction by the reaction of said spring 50.

Due to the number and comparatively wide distribution of the printing faces of the types carried by the date printing type bar, it is sometimes diflicult to obtain clear manifold impressions when therefore, that this construction readily lends" itself to the repeated date printing at a given point. Of course this might be obtained by repeated actuations of the date printing key 51. However, in order to increase the rapidity of operation and avoid the necessity of and delay occasioned by repeatedly actuating the key 51, I prefer in some instances to employ the modified form of trip releasing means disclosed in Fig. 9. The parts shown in this figure are identically the same as those shown in the preceding figures except that the releasing link 55 is devoid of the cam 60 employed on the link 55. It follows, therefore, that in the modified construction a depression of the date printing key 51 will result in moving the link 55 to the actuated Fig. 9 position without elevating the rear end of the link and freeing it from the trip 64. It will be seen, therefore, that as long as pressure is maintained on the date printing key 51 the trip 64 will be held in released position. The cam 40 will therefore be maintained coupled to its driving shaft 3'7 and continuously revolve therewith efiecting repeated operations of the date printing type bar until 1 the key 51 is released by the operator. When the depressed key 51 is released and returns to normal position, the link 55 will move forward thus enabling the trip 64 to re-engage the latch 45 and free the cam from the driving shaft 3'7. My 1 present invention, therefore, from certain of its aspects, contemplates a control by the date printing key for either a single operation only or a plurality of operations of the date printing type bar at each actuation of said key.

From the foregoing description it will be seen that the lever '74 and the parts controlled thereby, the universal bar 28 and the parts controlled thereby, the link 55, or 55*, and the parts by which it is supported and actuated are all carried by the upper swinging frame section 10 and are enabled to swing therewith without interference from the parts with which they coact on the lower or base section 11 of the frame. In swinging the upper frame section 10 down to its normal position, the roller '7'? will be brought to bear against its coacting cam 40, the link 55 will be brought into cooperative relation with the trip 64 and the arm 125 will be brought into cooperative relation withthe coacting universal bar 128. The construction is such therefore that these cooperative parts on the two frame sections are brought into cooperative relation ready to function.

It will be seen that I have provided comparatively simple and effective power actuated date printing mechanism which may be readily incorporated in existing machines, such as the Remington electrified bookkeeping machine hereinbefore referred to, without modifying or materially modifying the existing structural features of 145 What I claim as new and desire to secure by Letters Patent is:

1. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detachably connected thereto and operative to simultaneously effect an imprint through a ribbon at the printing center, a ribbon vibrator for moving the ribbon into the path of said types, and key controlled power actuated means for operating said type carrier and ribbon vibrator.

2. In a date printing type action for typewriting and like machines, the combination of .a type bar comprising two sections one detachably connected to the other, means for detachably connecting a plurality of types to said detachable section, said plurality of type being arranged on the type bar to print simultaneously and key controlled power actuated means for operating said type bar. Y

3. In a date printing type action for typewriting and like machines, the combination of a type bar comprising two sections one detachably connected to the other, means for detachably connecting a plurality of types to said detachable section, said type bar operating to simultaneously effect an imprint from a plurality of types on the bar through a ribbon at the printing center, a ribbon vibrator for moving the ribbon into the path of said types, and key controlled power actuated means for operating said type bar and ribbon vibrator.

4. In a date printing type action for typewriting and like machines, the combination of a type bar comprising two sections one detachably connected to the other, means for detachably securing a plurality of types to said detachable section in such a manner as to print simultaneously, power operated means for actuating said type bar, a finger key for controlling said power operated means, a ribbon vibrator for moving the ribbon intothe path of said types, and means controlled by said power operated means for actuating said ribbon vibrator.

5. In a date printing type action for typewriting and like machines, the combination of a type bar operative to print at the printing center, means for detachably securing a plurality of separate types to the type bar in such a manner as to print simultaneously, one of said types having a printing face to designate the month, another having a printing face to designate the day of the month and a third having a printing face to designate the year, power operated means for actuating said type bar, a key at the keyboard, and means controlled by said key for controlling said power actuated means.

6. In a date printing type action for typewriting and like machines, the combination of a type bar operative to print at the printing center and comprising two sections one detachably connected to the other, means for detachably securing a plurality of separate types to said detachable section, one of said types having a printing face to designate 'the month, another type having a printing face to designate the day of the month and a third type having a printing face to designate the year, the detachment of the detachable section of the type bar facilitating a removal of types from and the substitution therefor of other interchangeable types on said bar outside of the machine, power operated means for actuating said type bar, and a key for controlling said power operated means.

'7. In a date printing type action for typewriting and like machines, the combination of a type bar operative to print at the printing center and comprising two sections one detachably connected to the other, means for detachably securing a plurality of separate types to said detachable section, one of said types having a printing face to designate the month, another type having a printing face to designate the day of the month and a third type having a printing face to designate the year, the detachment of the detachable section of the type bar facilitating a removal of types from and the substitution therefor of other interchangeable types on said bar outside of the machine, power operated means for actuating said type bar, a ribbon vibrator for interposing the ribbon in the path of said types, means controlled by said power operated means for actuating said ribbon vibrator, and a key at the keyboard for controlling said power operated means.

8. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detachably connected thereto and arranged on the carrier to print simultaneously, and key controlled power actuated means for operating said type carrier comprising a continuously running power driven shaft, a cam on said shaft, means controlled by said cam for actuating said type carrier, and key controlled means for coupling said cam to turn with said shaft.

9. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detachably connected thereto and operative to simultaneous- 1y effect an imprint therefrom through a ribbon at the printing center, a ribbon vibrator for moving the ribbon into the path of said types, and key controlled power actuated means for operating said type carrier and ribbon vibrator comprising a continuously running power driven shaft, a cam on said shaft, means controlled by said cam for actuating said type carrier and ribbon vibrator, a key, and means controlled thereby for coupling said cam to turn with said shaft during a single revolution only at each 120 actuation of said key.

10. In a date printing type action for typewriting and like machines, the combination of a type bar operative to print at the printing center and comprising two sections one detachably 125 connected to the other, means for detachably securing a plurality of separate types to said detachable section, one of said types having a printing face to designate the month, another type having a printing face to designate the day of 130 the month and a third type having a printing face to designate the year, the detachment of the detachable section of the type bar facilitating a removal of types from and the substitution therefor of other interchangeable types on 135 said bar outside of the machine, a continuously running power operated shaft, a cam. loosely mounted on said shaft, means operated by said cam for actuating said type bar, a finger key, and means controlled by said key for coupling said 140 cam to' turn with said shaft during a single revolution only at each actuation of said key.

11. In a date printing type action for typewriting and like machines, the combination of a type bar operative to print at the printing 145 center and comprising two sections one detachably connected to the other, means for detachably securing a plurality of separate types to said detachable section, one of said types having a printing face to designate the month, an-

other type having a printing face to designate the day of the month and a third type having a printing face to designate the year, the detachment of the detachable section of the type bar facilitating a removal of types from and the subcomprising two relatively movable sections, of a date printing type bar having types detachably secured thereto to provide for changing the date written by said type bar, and key controlled power driven means for actuating said type bar carried in part by one of said sections and in part by the other.

13. The combination with a machine frame comprising two relatively movable sections, of a date printing type bar having types detachably secured thereto to provide for changing the date written by said type bar, and key controlled power driven means for actuating said type bar carried in part by one of said sections and in part by the other, the construction and arrangement being such that cooperative parts of the power driven actuating means on the two frame sections enable one section to be moved relatively to the other without interference from said parts and when the sections are brought together such parts will be brought into cooperative relation ready to function.

14. The combination with a machine frame comprising two relatively movable sections, of a date printing type bar having types detachably secured thereto to provide for changing the date written by said type bar, and key controlled power driven means for actuating said type bar comprising a power driven cam carried by one of said sections, type bar actuating devices carried by the other of said sections and one of which devices coacts with said cam, said last mentioned device-separating from the cam when the frame sections are separated and brought into cooperative relation with the cam ready to function when the frame sections are brought together.

15. The combination with a machine frame comprising two relatively movable sections, of a date printing type bar comprising two members one detachably connected to the other, means for detachably securing a plurality of separate types to said detachable member, and. power operated means for actuating said type bar carried in part by one of said frame sections and in part by the other, cooperative parts of said power operated means on the two frame sections being separated when the two frame sections are relatively displaced and brought into cooperative relation ready to function when the frame sections are brought together.

16. The combination with a machine frame comprising two relatively movable sections, of a date printing type bar comprising two members one detachably connected to the other, means for detachably securing a plurality of separate types to said detachable member, and power operated means for actuating said type bar comprising a continuously running power driven shaft carried by one of said frame sections, a loosely mounted on said shaft, key controlled coupling means for coupling said cam to turn with said shaft, an actuating member carried by the other frame section and operatively connected with said type bar and separable from said cam when one of the frame sections is moved away from the other and brought into cooperative relation with said cam ready to be actuated thereby when the frame sections are brought together.

17. The combination with a machine frame comprising two relatively movable sections, of a date printing type bar having types detachably secured thereto to provide for changing the date written by said type bar, a ribbon vibrator for moving the ribbon into the path of said types and power operated means for actuating said type bar and ribbon vibrator, said power operated means comprising coacting parts carried by the two frame sections and which are brought into cooperative relation ready to function when the frame sections are brought together.

18. The combination with a machine frame comprising two relatively movable sections, of a date printing type bar having types detachably secured thereto to provide for changing the date written by said type bar, a ribbon vibrator for moving the ribbon into the path of said types, and power operated means for actuating said type bar and ribbon vibrator, said power operated means comprising a continuously running power driven shaft, a cam, key controlled means for connecting said cam to be turned by said shaft, and an actuating device controlled by said cam and operatively connected to said type bar and ribbon vibrator, said cam being carried by one of said frame sections and the actuating device carried by the other frame section, the actuating device and cam being brought into 00- operative relation ready to function when the frame sections are brought together.

19. The combination of a type bar, a plurality of separate types, means for detachably securing said types to said type bar, an actuating lever operatively connected to said type bar and carrying an anti-friction roller, and a key controlled power actuated cam against which said roller is adapted to bear.

20. The combination of a type bar, a plurality of separate types, means for detachably securing said types to said type bar, an actuating lever operatively connected to said type bar and carrying an anti-friction roller, a key controlled power actuated cam against which said roller is adapted to bear, a spring which presses said roller against the cam, and a high spot on the cam with which said roller coacts when the parts are in the normal position to prevent an accidental displacement of the cam from normal position..

21. The combination of a type bar, a plurality of separate types, means for detachably securing said types to said type bar, a ribbon vibrator for moving the ribbon into the path of the types on said type bar, an actuating lever operatively connected to said type bar and ribbon vibrator and carrying an anti-friction roller, a key controlled power actuated cam against which said roller is adapted to bear, and a spring which causes said roller to bear against the cam, said cam having a high spot with which said roller coacts in the normal position of the parts to prevent an accidental displacement of the cam from normal said types to said type bar, an actuatinglever operatively connected to said type bar and carrying an anti-friction roller, a continuously running power driven, shaft, a cam loosely mounted on said shaft and against which said roller is adapted to bear, a spring actuated locking pawl carried by said cam for connecting the cam to turn with said shaft, a trip coacting with said pawl to re lease it and arrest the cam, and key controlled means coacting with said trip.

23. The combination of a type bar, a plurality of separate types, means for detachably securing said types to said type bar, an actuating lever operatively connected to said type bar and carrying an anti-friction roller, a continuously running power driven shaft, a cam loosely mounted on said shaft and against which said roller is adapted to bear, a spring actuated locking pawl carried by said cam for connecting the cam to turn with said shaft, a trip coacting with said pawl to release it and arrest the cam, a high spot on said cam with which said roller coacts in the normal position of the parts to resist the tendency of the cam to be moved from its normal position under the reactive force of the spring of said locking pawl, a spring which exerts its force on said actuating lever to overcome the force of the spring of the locking pawl when the latter is released, and key controlled means coacting with said trip.

24. The combination of a date printing type bar, a plurality of separate types, means for readily detachably securing said types to the type bar to change the dates written thereby, a ribbon vibrator for moving the ribbon into the path of the types on said type bar, a universal bar operatively connected to said ribbon vibrator, an actuating lever operatively connected to said type bar and to said universal bar, a continuously running power driven shaft, a cam loosely mounted thereon and by which said actuating lever is operated, and key controlled means for coupling the.

cam to turn with said shaft during a single revolution only thereof at each actuation of the key.

25. In a date printing type action for typewriting and like machines the combination of a type carrier having a plurality of types detachably connected thereto and operative to simultaneously eiTect an imprint through a ribbon at the printing center, a ribbon vibrator for moving the ribbon into the path of said types, and key controlled power actuated means for operating said type carrier and ribbon vibrator continuously as long as the key of said key controlled means is maintained depressed.

26. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detach- -'actuated means for operating said type carrier.

ably connected thereto, and key controlled power actuated means for operating said type carrier comprising a continuously running power driven shaft, a cam on said shaft, means controlled by said cam for actuating said type carrier, and key controlled means for coupling said cam to turn with said shaft as long as the key of said key controlled means is maintained depressed.

27. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detachably connected thereto and operative to simultaneously effect an imprint through a ribbon at the printing center, a ribbon vibrator for moving the ribbon into the path of said types, and key controlled power actuated means for operating said type carrier and ribbon vibrator comprising a continuously running power driven shaft, a cam thereon, means controlled by said cam for actuating said type carrier and ribbon vibrator, a key, and means controlled thereby for coupling said cam to turn with said shaft and for maintaining the cam thus coupled as long as said key is maintained depressed and for uncoupling the cam from the shaft when the depressed key returns to normal position.

28. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detachably connected thereto and fixedly arranged on the carrier to print simultaneously, the construction and arrangement of the parts being such that the simultaneous imprint from said types is effected at the printing center, and key controlled power- 29. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detachably connected thereto and fixedly arranged thereon to simultaneously effect an imprint therefrom, the construction and arrangement of the parts being such that the simultaneous imprint from said types is effected at the printing center, a key at the keyboard of the machine, and power actuated means controlled by said key for operating said type carrier.

30. In a date printing type action for typewriting and like machines, the combination of a type carrier having a plurality of types detachably connected thereto and fixedly arranged on the carrier to print simultaneously, the construction and arrangement of the parts being such that the simultaneous imprint from said types is effected at the printing center, and key controlled power actuated means for operatingsaid type carrier continuously as long as the key of said key controlled means is maintained depressed.

FREDERICK A. HART. 

